Modern construction involves the use of efficient energy-saving materials that ensure the tightness of the premises. This can cause a problem such as windows fogging up. As a result, condensation forms. It causes mold to spread and cause discomfort.
Such a microclimate can cause he alth deterioration: migraine, asthenia, drowsiness. To solve this problem, they resort to installing a device such as a CPV (ventilation valve).
Types of intake devices
The modern building materials market is full of different models of supply ventilation valves. They are window or wall.
Each modification is applicable to the customer, but both are designed for the same purpose - to freshen the air in the room. Therefore, as a rule, devices are equipped with a filter that traps small contaminants.
The following air supply valves exist:
- devices equipped withconstant section (window);
- devices with cross section regulation (air supply intensity level (wall);
- Forced air models.
Inlet valves mounted on window frames
The supply ventilation valve for plastic windows is the most common. It has a simple design and can automatically purify the air in the room for 24 hours.
The window device is a slot in the window with shutters. The performance level of this instrument is 3-7m3/hr.
Windows with a fresh air valve can be plastic, wood or aluminum. The device is installed at the top of the window.
Conditions under which window models function
For the correct functioning of window modifications, they need special conditions:
- The room must be equipped with natural exhaust.
- The outside air temperature should not exceed +5 degrees.
- The front door must be hermetically sealed, as there is a danger of air being drawn out by the entrance.
- Air must circulate between rooms. This means that the doors must either be open or have a 2 cm gap above the floor.
Many users note that window ventilation valves are prone to freezing. This happens whenincorrect adjustment of the device. In severe frosts, it is not recommended to close the device. If there is a need to close it, then the outer part should be sealed.
Pros of window devices
- The supply ventilation valve for plastic windows does not spoil the interior. The device is inconspicuous in the room.
- Installation is easy and takes about an hour.
- Windows and walls are soundproofed.
- The supply air is directed upwards to eliminate drafts.
- All automatic models are equipped with a hygrometer that regulates the humidity of the air.
- The maximum output of the unit is 30m2/h of fresh air, and the minimum is 5m2/h.
- Window unit is inexpensive.
Negative sides
- In autumn and winter, cold air enters the room, which increases heating costs.
- Devices function only when the hood is working.
- Low throughput.
- The valves do not have filters to clean the air from dust, which is inconvenient.
- In some cases, there is a danger of freezing devices.
Wall models
Inlet ventilation valves of this type consist of a pipe equipped with sound and heat insulation, located in the wall. From the outside, a grate with a mosquito net is mounted on the pipe, and inside there is a valve that regulates the degree of air supply.
Upgraded models are adjusted manually orautomatically.
Automated instrument responds:
- on polluted air;
- humidity difference;
- pressure surges.
At its core, a wall device is no different from a window device and has the same positive and negative sides, except for the following indicators:
- The power level of wall models can reach 60-70m2/h;
- a coarse filter is installed in the device;
- In comparison with window modification, wall modification is more difficult to install.
The wall unit provides increased air circulation, allows you to adjust the air flow rate. The design of the valve prevents the penetration of moisture into the room. It features high noise isolation.
Operation principle
The air flow, passing through the ventilation grill, enters the soundproofing material, where it is cleaned of dust. This device is equipped with a labyrinth channel, which reduces the air flow rate and exposes it to rough cleaning. After that, clean air is sent to the damper with regulation, where it enters the room through the holes.
Cons of the model
With all the pluses, wall models also have negative sides. They require timely care, although they may not tell you about this when buying. Once a season, the valve needs to be disassembled and the filters cleaned.
In addition, according to user reviews, some species are prone to freezing. This happens if the device pipemetal. But it should be noted that almost all manufacturers produce such a device as a plastic supply ventilation, the valve of which is not subject to icing and condensate settling. The disadvantage of these types of units can be attributed to their high cost. It ranges from 2500 to 4000 rubles. But according to experts, the price is adequate. After all, valves ensure a he althy indoor climate.
Where are wall models installed?
Installation of a supply ventilation valve of this type can be carried out in country houses, apartments, factories and factories, in public buildings. This type is often used in medical institutions, schools and kindergartens. The wall model is suitable for houses with low ceilings.
According to experts, the installation of the device is advisable in kindergartens, as it prevents the development of mold, which adversely affects the body of babies.
Modifications with forced air supply
The forced air inlet valve is characterized by:
- motorized fan;
- additional cleaning filters;
- air preheater.
The unit often includes a carbon filter to purify the air from harmful gases.
Devices of this type have a high degree of throughput - up to 120 m2/h.
Pros and cons of the unit
The advantages of the device include the following:
- The valve functions even if the ventilation is faulty.
- It has an additional air purification system.
- Reduces carbon dioxide and dust particles.
- Normalizes the indoor humidity.
Cons of the device:
- many types of these devices do not have a pre-heating function, which is inconvenient for use in winter;
- such devices are expensive.
Tips & Tricks
- Devices are installed in rooms where there are windows.
- Inlet ventilation valves are installed in all rooms of the apartment.
- The level of incoming and outgoing air must be the same.
- In the kitchen, where there is a gas stove, an adjustable air supply unit is installed.
- It is recommended to install valves at a height of 2 meters or more from the floor near window openings.
- The devices are not recommended to be mounted in the toilet and bath, as there is a high level of humidity. In winter, increased condensation may form, which will cause the devices to freeze. This interferes with ventilation.
- In order to avoid freezing of the units, heating devices should be installed.
- Inlet valves are mounted in rooms with windows whose infiltration coefficient is less than 0.3 m2/h.
- Air exchange rate per person should be 30m2/h
- If the walls and windows face a noisy street, thenadditional dampening valves.
- Appliances are mounted near radiators to keep cold air warm in winter
- When buying appliances, you should pay attention to the presence of a filtration system. Otherwise, in areas with high pollution, you risk that a large amount of dust will enter your premises.
Installation features
When choosing a ventilation system, pay attention to the pros and cons of each device. When choosing a wall model, an urgent decision is not required, but when choosing a window type, you need to make a purchase faster, as the cold is coming and the windows will soon be closed. In addition, this view is not equipped with a filter system, and the cost of a window view with additional components is quite high. In a word, the wall valve for supply ventilation has more positive aspects. In addition, you can mount it yourself.
Before starting installation, determine where the valve will stand. As a rule, they choose an inconspicuous place, but often, depending on the taste of the owner of the room, other parts of the wall.
The device must be located in a wall that performs a load-bearing function. This is required to organize the flow of air from the street.
What tools do you need?
To install the device yourself you will need:
- Puncher with a drill-drill or a bit with soldering from Pobedit of the required diameter.
- Set of drills designedfor concrete and brick.
- Curly-shaped screwdriver.
Progress of work
First of all, a hole is drilled in the wall, the diameter of which is taken with a margin. So the pipe will pass freely and take the correct position. The length of the valve is selected taking into account the wall thickness indicator. The length of the pipe is 0.4-1 m. After installation, all slots are closed with construction foam. To prevent the penetration of moisture from the outside, a rain deflector is installed.
Important points to consider when installing:
- make sure there are no electrical wires in the wall before drilling;
- when working, wear protective equipment such as gloves, goggles, etc.;
- If you cannot determine if there is electrical wiring in the wall, seek professional help.
Manufacturers and cost
When buying a device, pay attention to the country of origin.
The original supply channel is the KIV-125 model from the Finnish company Flakt Woods. The cost of the product is 4800 rubles. The Chinese copy of the KIV-125 is inferior in quality to the Finnish product.
The popularity of the flow device has increased so much that some manufacturers, for example, the domestic company Perviy Passazh, have begun to produce such modifications. Of these, the models KVP-125, VPK-125, KPV-125, VK-8 can be noted.
The KPV-125 device is also an analogue of the KIV-125 design. The cost of a domestic device is one and a half times lower than the original model. It is 3100 rubles. It should be noted thatthis model is in no way inferior to the original Finnish valve.
From domestic appliances, it should also be noted "Domvet" - a supply ventilation valve, the price of which is 1500 rubles.
Also on the market is a modification called KIV Quadro from the Italian company Vortice. The cost of the device is about the same as that of the Finnish one. It has identical features. The difference is in the shape of the heads. Italian supply valves are square, while Finnish ones are round.
Currently, the Western market is replete with devices of this type. Window ventilation valves from the French company Aereco, the Belgian manufacturers Renson and Titon, and the German brand Siegenia are already known on the domestic market of building materials.
User reviews
About such a device as a supply ventilation valve, the reviews are the most positive. According to users, the device helps to fill the premises with fresh air, but it does not feel cold.
Bedrooms and playrooms for kids were chosen as experimental rooms in one of the kindergartens. For all the time of operation of the device have proven themselves from the best side. Enough fresh air was supplied to the room. Children and staff did not complain about stuffiness, cold or noise from the street.
